Konsole consumes too much vertical space with default 2 toolbars. It would be nice to be able to hide it and move to the main toolbar as a component.
I'm afraid this isn't something we plan to do, nor is it even easily possible given the way our apps are designed and programmed. If you find that the default arrangement takes up too much space, you're more than welcome to hide the toolbar, or the menubar, or both. Personally I quite like hiding the menubar, and then a hamburger menu appear on the toolbar with all the necessities in it.